Where: Medina County, Texas (29.4° N, 99.3° W: paleocoordinates 34.9° N, 72.6° W)
• small collection-level geographic resolution
When: Baculites maclearni ammonoid zone, Anacacho Limestone Formation, Middle Campanian (83.5 - 70.6 Ma)
• Swezey and Sullivan (2004) correlate this bed to the Baculites maclearni zone., which is middle Campanian in Gradstein et al., 2004.
• group of beds-level stratigraphic resolution
Environment/lithology: marine; calcareous shale
Size class: mesofossils
Reposited in the USGS
Primary reference: W. P. Elder. 1996. Bivalves and Gastropods from the Middle Campanian Anacacho Limestone, south central Texas. Journal of Paleontology 70(2):247-271 [M. Patzkowsky/K. Layou/J. Alroy]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 3601: authorized by Mark Patzkowsky, entered by Karen Layou on 05.08.1999
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
| |
Bivalvia | |
Panopea anacachoensis n. sp.
| |
Pycnodonte mutabilis oyster | |
Cephalopoda | |
Baculites sp. Lamarck 1799 ammonite |